Brian Oconnor, MD
NPI 1770641870 · Rheumatology Physician · Pasadena, CA
Enrolled with Medicare as Practitioner - Rheumatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Brian Oconnor, MD is a Rheumatology Physician provider in Pasadena, CA (NPI 1770641870).
Provider details
- NPI number
- 1770641870
- Entity type
- Individual
- Primary specialty
- Rheumatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- G040893 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-12-04
- Last updated
- 2011-07-15
Frequently asked questions
- What is Brian Oconnor's NPI number?
- Brian Oconnor's National Provider Identifier (NPI) is 1770641870, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Brian Oconnor's specialty?
- Brian Oconnor is listed in the NPPES registry with a primary specialty of Rheumatology Physician (Allopathic & Osteopathic Physicians).
- Where is Brian Oconnor located?
- Brian Oconnor's practice location on file with NPPES is 675 S Arroyo Pkwy, Pasadena, CA 91105-3264.
- What is Brian Oconnor's phone number?
- The practice phone number listed in the NPPES registry for Brian Oconnor is (626) 795-4116.
- Does Brian Oconnor accept Medicare?
- Brian Oconnor is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Brian Oconnor's NPI active?
- Yes — Brian Oconnor's NPI (1770641870) is active in the NPPES registry as of the last update on 2011-07-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.